Checking rear diff oil

[Scrapla]

I want to check my rear diff oil because i'm hearing like a slight rubbing or grinding noise from the rear right wheel area and just want to check the fluid level in the diff. first, I found the plug but its a very ackward angle for me to reach I have a sloped driveway and only two jackstands and I know to get an accurate reading the car must be level when you check the fluid, is there a easier way to get to this plug or to check the fluid because ive been reaching from behind the diff around to the plug and its not working to well.